An equilateral triangle shaped sign pointed down means:

a. yield to other vehicles and pedestrians
b. stop
c. school zone ahead

This term refers to the number of people per unit area (usually a kilometer or a mile). this could refer to the number of people per square mile in a city, a county, a province, a state, or a nation.

Icivics worksheet : rules for running a country

Restricting immigrants from entering a country may be based on what belief?